Material analysis of the Thermalright TF4
This cheap paste relies on significantly more inexpensive ZnO than the other pastes, the zinc oxide here is mixed almost 1:1 with the Al2O3. The rest is silicon (silicon, hydrogen and the oxygen not bound in the oxides). The paste is certainly not a miracle of high technology, but you get what you pay for. It is certainly good value for money and, above all, more honest than the first two pseudo-carbon blenders.
Material analysis of the Thermalright TF7
If you look at the Thermalright TF7 in comparison to the TF4, you quickly realize why it performs better, because this is what a modern paste in the entry-level range should actually look like. The zinc oxide content is significantly lower and the proportion of silicone is also lower than in the TF4. This is logical, as the paste is therefore somewhat more viscous and, above all, more durable within the limits of its capabilities.
Material analysis of the Thermalright TF8
Let’s now take a closer look at what the TF8 actually contains and what it doesn’t contain. The paste again contains a lot of fillers, mainly very fine aluminum oxide. As with TF7, the ZnO is primarily used only as a gap filler between the slightly larger (and harder) Al2O3 grains. The composition is almost analogous to TF7, but theTF8 is simply filled a little higher and, above all, with somewhat finer particles. The paste therefore benefits from its fineness in terms of the degree of grinding and viscosity. However, you have to take these circumstances into account when applying the paste. But it is certainly feasible.
Material analysis of the Thermalright TF9
The TF9 contains even more Al2O3 of varying degrees of fineness and the proportion of silicone oil continues to shrink. Unfortunately, this was to be expected in this form. Yes, it’s still paste and not putty, but it’s already borderline.
Material analysis of the Thermalright TFX
The TFX contains even more Al2O3 than the TF9 and the zinc oxide content has at least remained the same. This in turn means that even less silicone can act as a binder (and “adhesive”), which makes this paste almost unusable. You can also see from the picture above that the particles are much larger.
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